replace all tabs with four spaces

The PEAR coding standards decree: no tabs, but indent by four spaces.
I've done a global search-and-replace on all tabs, replacing them by
four spaces. This is a huge change, but it will go a long way to
getting us towards phpcs-compliance. And that means better code
readability, and that means more participation.

darcs-hash:20081223191907-84dde-21e8efe210e6d5d54e935a22d0cee5c7bbfc007d.gz

1 files changed, 371 insertions, 371 deletions

diff --git a/actions/finishopenidlogin.php b/actions/finishopenidlogin.php
index 766a08b20..a2a778f31 100644
--- a/actions/finishopenidlogin.php
+++ b/actions/finishopenidlogin.php
@@ -23,414 +23,414 @@ require_once(INSTALLDIR.'/lib/openid.php');
 
 class FinishopenidloginAction extends Action {
 
-	function handle($args) {
-		parent::handle($args);
-		if (common_logged_in()) {
-			common_user_error(_('Already logged in.'));
-		} else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
-			$token = $this->trimmed('token');
-			if (!$token || $token != common_session_token()) {
-				$this->show_form(_('There was a problem with your session token. Try again, please.'));
-				return;
-			}
-			if ($this->arg('create')) {
-				if (!$this->boolean('license')) {
-					$this->show_form(_('You can\'t register if you don\'t agree to the license.'),
-									 $this->trimmed('newname'));
-					return;
-				}
-				$this->create_new_user();
-			} else if ($this->arg('connect')) {
-				$this->connect_user();
-			} else {
-				common_debug(print_r($this->args, true), __FILE__);
-				$this->show_form(_('Something weird happened.'),
-								 $this->trimmed('newname'));
-			}
-		} else {
-			$this->try_login();
-		}
-	}
-
-	function show_top($error=NULL) {
-		if ($error) {
-			common_element('div', array('class' => 'error'), $error);
-		} else {
-			global $config;
-			common_element('div', 'instructions',
-						   sprintf(_('This is the first time you\'ve logged into %s so we must connect your OpenID to a local account. You can either create a new account, or connect with your existing account, if you have one.'), $config['site']['name']));
-		}
-	}
-
-	function show_form($error=NULL, $username=NULL) {
-		common_show_header(_('OpenID Account Setup'), NULL, $error,
-						   array($this, 'show_top'));
-
-		common_element_start('form', array('method' => 'post',
-										   'id' => 'account_connect',
-										   'action' => common_local_url('finishopenidlogin')));
-		common_hidden('token', common_session_token());
-		common_element('h2', NULL,
-					   _('Create new account'));
-		common_element('p', NULL,
-					   _('Create a new user with this nickname.'));
-		common_input('newname', _('New nickname'),
-					 ($username) ? $username : '',
-					 _('1-64 lowercase letters or numbers, no punctuation or spaces'));
-		common_element_start('p');
-		common_element('input', array('type' => 'checkbox',
-									  'id' => 'license',
-									  'name' => 'license',
-									  'value' => 'true'));
-		common_text(_('My text and files are available under '));
-		common_element('a', array(href => common_config('license', 'url')),
-					   common_config('license', 'title'));
-		common_text(_(' except this private data: password, email address, IM address, phone number.'));
-		common_element_end('p');
-		common_submit('create', _('Create'));
-		common_element('h2', NULL,
-					   _('Connect existing account'));
-		common_element('p', NULL,
-					   _('If you already have an account, login with your username and password to connect it to your OpenID.'));
-		common_input('nickname', _('Existing nickname'));
-		common_password('password', _('Password'));
-		common_submit('connect', _('Connect'));
-		common_element_end('form');
-		common_show_footer();
-	}
-
-	function try_login() {
-
-		$consumer = oid_consumer();
-
-		$response = $consumer->complete(common_local_url('finishopenidlogin'));
-
-		if ($response->status == Auth_OpenID_CANCEL) {
-			$this->message(_('OpenID authentication cancelled.'));
-			return;
-		} else if ($response->status == Auth_OpenID_FAILURE) {
-			// Authentication failed; display the error message.
-			$this->message(sprintf(_('OpenID authentication failed: %s'), $response->message));
-		} else if ($response->status == Auth_OpenID_SUCCESS) {
-			// This means the authentication succeeded; extract the
-			// identity URL and Simple Registration data (if it was
-			// returned).
-			$display = $response->getDisplayIdentifier();
-			$canonical = ($response->endpoint->canonicalID) ?
-			  $response->endpoint->canonicalID : $response->getDisplayIdentifier();
-
-			$sreg_resp = Auth_OpenID_SRegResponse::fromSuccessResponse($response);
-
-			if ($sreg_resp) {
-				$sreg = $sreg_resp->contents();
-			}
-
-			$user = oid_get_user($canonical);
-
-			if ($user) {
-				oid_set_last($display);
-				# XXX: commented out at @edd's request until better
-				# control over how data flows from OpenID provider.
-				# oid_update_user($user, $sreg);
-				common_set_user($user);
-				common_real_login(true);
-				if (isset($_SESSION['openid_rememberme']) && $_SESSION['openid_rememberme']) {
-					common_rememberme($user);
-				}
+    function handle($args) {
+        parent::handle($args);
+        if (common_logged_in()) {
+            common_user_error(_('Already logged in.'));
+        } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
+            $token = $this->trimmed('token');
+            if (!$token || $token != common_session_token()) {
+                $this->show_form(_('There was a problem with your session token. Try again, please.'));
+                return;
+            }
+            if ($this->arg('create')) {
+                if (!$this->boolean('license')) {
+                    $this->show_form(_('You can\'t register if you don\'t agree to the license.'),
+                                     $this->trimmed('newname'));
+                    return;
+                }
+                $this->create_new_user();
+            } else if ($this->arg('connect')) {
+                $this->connect_user();
+            } else {
+                common_debug(print_r($this->args, true), __FILE__);
+                $this->show_form(_('Something weird happened.'),
+                                 $this->trimmed('newname'));
+            }
+        } else {
+            $this->try_login();
+        }
+    }
+
+    function show_top($error=NULL) {
+        if ($error) {
+            common_element('div', array('class' => 'error'), $error);
+        } else {
+            global $config;
+            common_element('div', 'instructions',
+                           sprintf(_('This is the first time you\'ve logged into %s so we must connect your OpenID to a local account. You can either create a new account, or connect with your existing account, if you have one.'), $config['site']['name']));
+        }
+    }
+
+    function show_form($error=NULL, $username=NULL) {
+        common_show_header(_('OpenID Account Setup'), NULL, $error,
+                           array($this, 'show_top'));
+
+        common_element_start('form', array('method' => 'post',
+                                           'id' => 'account_connect',
+                                           'action' => common_local_url('finishopenidlogin')));
+        common_hidden('token', common_session_token());
+        common_element('h2', NULL,
+                       _('Create new account'));
+        common_element('p', NULL,
+                       _('Create a new user with this nickname.'));
+        common_input('newname', _('New nickname'),
+                     ($username) ? $username : '',
+                     _('1-64 lowercase letters or numbers, no punctuation or spaces'));
+        common_element_start('p');
+        common_element('input', array('type' => 'checkbox',
+                                      'id' => 'license',
+                                      'name' => 'license',
+                                      'value' => 'true'));
+        common_text(_('My text and files are available under '));
+        common_element('a', array(href => common_config('license', 'url')),
+                       common_config('license', 'title'));
+        common_text(_(' except this private data: password, email address, IM address, phone number.'));
+        common_element_end('p');
+        common_submit('create', _('Create'));
+        common_element('h2', NULL,
+                       _('Connect existing account'));
+        common_element('p', NULL,
+                       _('If you already have an account, login with your username and password to connect it to your OpenID.'));
+        common_input('nickname', _('Existing nickname'));
+        common_password('password', _('Password'));
+        common_submit('connect', _('Connect'));
+        common_element_end('form');
+        common_show_footer();
+    }
+
+    function try_login() {
+
+        $consumer = oid_consumer();
+
+        $response = $consumer->complete(common_local_url('finishopenidlogin'));
+
+        if ($response->status == Auth_OpenID_CANCEL) {
+            $this->message(_('OpenID authentication cancelled.'));
+            return;
+        } else if ($response->status == Auth_OpenID_FAILURE) {
+            // Authentication failed; display the error message.
+            $this->message(sprintf(_('OpenID authentication failed: %s'), $response->message));
+        } else if ($response->status == Auth_OpenID_SUCCESS) {
+            // This means the authentication succeeded; extract the
+            // identity URL and Simple Registration data (if it was
+            // returned).
+            $display = $response->getDisplayIdentifier();
+            $canonical = ($response->endpoint->canonicalID) ?
+              $response->endpoint->canonicalID : $response->getDisplayIdentifier();
+
+            $sreg_resp = Auth_OpenID_SRegResponse::fromSuccessResponse($response);
+
+            if ($sreg_resp) {
+                $sreg = $sreg_resp->contents();
+            }
+
+            $user = oid_get_user($canonical);
+
+            if ($user) {
+                oid_set_last($display);
+                # XXX: commented out at @edd's request until better
+                # control over how data flows from OpenID provider.
+                # oid_update_user($user, $sreg);
+                common_set_user($user);
+                common_real_login(true);
+                if (isset($_SESSION['openid_rememberme']) && $_SESSION['openid_rememberme']) {
+                    common_rememberme($user);
+                }
                 unset($_SESSION['openid_rememberme']);
-				$this->go_home($user->nickname);
-			} else {
-				$this->save_values($display, $canonical, $sreg);
-				$this->show_form(NULL, $this->best_new_nickname($display, $sreg));
-			}
-		}
-	}
-
-	function message($msg) {
-		common_show_header(_('OpenID Login'));
-		common_element('p', NULL, $msg);
-		common_show_footer();
-	}
-
-	function save_values($display, $canonical, $sreg) {
-		common_ensure_session();
-		$_SESSION['openid_display'] = $display;
-		$_SESSION['openid_canonical'] = $canonical;
-		$_SESSION['openid_sreg'] = $sreg;
-	}
-
-	function get_saved_values() {
-		return array($_SESSION['openid_display'],
-					 $_SESSION['openid_canonical'],
-					 $_SESSION['openid_sreg']);
-	}
-
-	function create_new_user() {
+                $this->go_home($user->nickname);
+            } else {
+                $this->save_values($display, $canonical, $sreg);
+                $this->show_form(NULL, $this->best_new_nickname($display, $sreg));
+            }
+        }
+    }
+
+    function message($msg) {
+        common_show_header(_('OpenID Login'));
+        common_element('p', NULL, $msg);
+        common_show_footer();
+    }
+
+    function save_values($display, $canonical, $sreg) {
+        common_ensure_session();
+        $_SESSION['openid_display'] = $display;
+        $_SESSION['openid_canonical'] = $canonical;
+        $_SESSION['openid_sreg'] = $sreg;
+    }
+
+    function get_saved_values() {
+        return array($_SESSION['openid_display'],
+                     $_SESSION['openid_canonical'],
+                     $_SESSION['openid_sreg']);
+    }
+
+    function create_new_user() {
 
         # FIXME: save invite code before redirect, and check here
 
-		if (common_config('site', 'closed') || common_config('site', 'inviteonly')) {
-			common_user_error(_('Registration not allowed.'));
+        if (common_config('site', 'closed') || common_config('site', 'inviteonly')) {
+            common_user_error(_('Registration not allowed.'));
             return;
         }
 
-		$nickname = $this->trimmed('newname');
+        $nickname = $this->trimmed('newname');
 
-		if (!Validate::string($nickname, array('min_length' => 1,
-											   'max_length' => 64,
-											   'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
-			$this->show_form(_('Nickname must have only lowercase letters and numbers and no spaces.'));
-			return;
-		}
+        if (!Validate::string($nickname, array('min_length' => 1,
+                                               'max_length' => 64,
+                                               'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
+            $this->show_form(_('Nickname must have only lowercase letters and numbers and no spaces.'));
+            return;
+        }
 
-		if (!User::allowed_nickname($nickname)) {
-			$this->show_form(_('Nickname not allowed.'));
-			return;
-		}
+        if (!User::allowed_nickname($nickname)) {
+            $this->show_form(_('Nickname not allowed.'));
+            return;
+        }
 
-		if (User::staticGet('nickname', $nickname)) {
-			$this->show_form(_('Nickname already in use. Try another one.'));
-			return;
-		}
+        if (User::staticGet('nickname', $nickname)) {
+            $this->show_form(_('Nickname already in use. Try another one.'));
+            return;
+        }
 
-		list($display, $canonical, $sreg) = $this->get_saved_values();
+        list($display, $canonical, $sreg) = $this->get_saved_values();
 
-		if (!$display || !$canonical) {
-			common_server_error(_('Stored OpenID not found.'));
-			return;
-		}
+        if (!$display || !$canonical) {
+            common_server_error(_('Stored OpenID not found.'));
+            return;
+        }
 
-		# Possible race condition... let's be paranoid
+        # Possible race condition... let's be paranoid
 
-		$other = oid_get_user($canonical);
+        $other = oid_get_user($canonical);
 
-		if ($other) {
-			common_server_error(_('Creating new account for OpenID that already has a user.'));
-			return;
-		}
+        if ($other) {
+            common_server_error(_('Creating new account for OpenID that already has a user.'));
+            return;
+        }
 
-		if ($sreg['country']) {
-			if ($sreg['postcode']) {
-				# XXX: use postcode to get city and region
-				# XXX: also, store postcode somewhere -- it's valuable!
-				$location = $sreg['postcode'] . ', ' . $sreg['country'];
-			} else {
-				$location = $sreg['country'];
-			}
-		}
+        if ($sreg['country']) {
+            if ($sreg['postcode']) {
+                # XXX: use postcode to get city and region
+                # XXX: also, store postcode somewhere -- it's valuable!
+                $location = $sreg['postcode'] . ', ' . $sreg['country'];
+            } else {
+                $location = $sreg['country'];
+            }
+        }
 
-		if ($sreg['fullname'] && strlen($sreg['fullname']) <= 255) {
-			$fullname = $sreg['fullname'];
-		}
+        if ($sreg['fullname'] && strlen($sreg['fullname']) <= 255) {
+            $fullname = $sreg['fullname'];
+        }
 
-		if ($sreg['email'] && Validate::email($sreg['email'], true)) {
-			$email = $sreg['email'];
-		}
+        if ($sreg['email'] && Validate::email($sreg['email'], true)) {
+            $email = $sreg['email'];
+        }
 
-		# XXX: add language
-		# XXX: add timezone
+        # XXX: add language
+        # XXX: add timezone
 
-		$user = User::register(array('nickname' => $nickname,
-									 'email' => $email,
-									 'fullname' => $fullname,
-									 'location' => $location));
+        $user = User::register(array('nickname' => $nickname,
+                                     'email' => $email,
+                                     'fullname' => $fullname,
+                                     'location' => $location));
 
-		$result = oid_link_user($user->id, $canonical, $display);
+        $result = oid_link_user($user->id, $canonical, $display);
 
-		oid_set_last($display);
-		common_set_user($user);
-		common_real_login(true);
+        oid_set_last($display);
+        common_set_user($user);
+        common_real_login(true);
         if (isset($_SESSION['openid_rememberme']) && $_SESSION['openid_rememberme']) {
-			common_rememberme($user);
-		}
+            common_rememberme($user);
+        }
         unset($_SESSION['openid_rememberme']);
-		common_redirect(common_local_url('showstream', array('nickname' => $user->nickname)));
-	}
+        common_redirect(common_local_url('showstream', array('nickname' => $user->nickname)));
+    }
 
-	function connect_user() {
+    function connect_user() {
 
-		$nickname = $this->trimmed('nickname');
-		$password = $this->trimmed('password');
+        $nickname = $this->trimmed('nickname');
+        $password = $this->trimmed('password');
 
-		if (!common_check_user($nickname, $password)) {
-			$this->show_form(_('Invalid username or password.'));
-			return;
-		}
+        if (!common_check_user($nickname, $password)) {
+            $this->show_form(_('Invalid username or password.'));
+            return;
+        }
 
-		# They're legit!
+        # They're legit!
 
-		$user = User::staticGet('nickname', $nickname);
+        $user = User::staticGet('nickname', $nickname);
 
-		list($display, $canonical, $sreg) = $this->get_saved_values();
+        list($display, $canonical, $sreg) = $this->get_saved_values();
 
-		if (!$display || !$canonical) {
-			common_server_error(_('Stored OpenID not found.'));
-			return;
-		}
+        if (!$display || !$canonical) {
+            common_server_error(_('Stored OpenID not found.'));
+            return;
+        }
 
-		$result = oid_link_user($user->id, $canonical, $display);
+        $result = oid_link_user($user->id, $canonical, $display);
 
-		if (!$result) {
-			common_server_error(_('Error connecting user to OpenID.'));
-			return;
-		}
+        if (!$result) {
+            common_server_error(_('Error connecting user to OpenID.'));
+            return;
+        }
 
-		oid_update_user($user, $sreg);
-		oid_set_last($display);
-		common_set_user($user);
-		common_real_login(true);
+        oid_update_user($user, $sreg);
+        oid_set_last($display);
+        common_set_user($user);
+        common_real_login(true);
         if (isset($_SESSION['openid_rememberme']) && $_SESSION['openid_rememberme']) {
-			common_rememberme($user);
-		}
-		unset($_SESSION['openid_rememberme']);
-		$this->go_home($user->nickname);
-	}
-
-	function go_home($nickname) {
-		$url = common_get_returnto();
-		if ($url) {
-			# We don't have to return to it again
-			common_set_returnto(NULL);
-		} else {
-			$url = common_local_url('all',
-									array('nickname' =>
-										  $nickname));
-		}
-		common_redirect($url);
-	}
-
-	function best_new_nickname($display, $sreg) {
-
-		# Try the passed-in nickname
-
-		if ($sreg['nickname']) {
-			$nickname = $this->nicknamize($sreg['nickname']);
-			if ($this->is_new_nickname($nickname)) {
-				return $nickname;
-			}
-		}
-
-		# Try the full name
-
-		if ($sreg['fullname']) {
-			$fullname = $this->nicknamize($sreg['fullname']);
-			if ($this->is_new_nickname($fullname)) {
-				return $fullname;
-			}
-		}
-
-		# Try the URL
-
-		$from_url = $this->openid_to_nickname($display);
-
-		if ($from_url && $this->is_new_nickname($from_url)) {
-			return $from_url;
-		}
-
-		# XXX: others?
-
-		return NULL;
-	}
-
-	function is_new_nickname($str) {
-		if (!Validate::string($str, array('min_length' => 1,
-										  'max_length' => 64,
-										  'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
-			return false;
-		}
-	if (!User::allowed_nickname($str)) {
-			return false;
-		}
-		if (User::staticGet('nickname', $str)) {
-			return false;
-		}
-		return true;
-	}
-
-	function openid_to_nickname($openid) {
+            common_rememberme($user);
+        }
+        unset($_SESSION['openid_rememberme']);
+        $this->go_home($user->nickname);
+    }
+
+    function go_home($nickname) {
+        $url = common_get_returnto();
+        if ($url) {
+            # We don't have to return to it again
+            common_set_returnto(NULL);
+        } else {
+            $url = common_local_url('all',
+                                    array('nickname' =>
+                                          $nickname));
+        }
+        common_redirect($url);
+    }
+
+    function best_new_nickname($display, $sreg) {
+
+        # Try the passed-in nickname
+
+        if ($sreg['nickname']) {
+            $nickname = $this->nicknamize($sreg['nickname']);
+            if ($this->is_new_nickname($nickname)) {
+                return $nickname;
+            }
+        }
+
+        # Try the full name
+
+        if ($sreg['fullname']) {
+            $fullname = $this->nicknamize($sreg['fullname']);
+            if ($this->is_new_nickname($fullname)) {
+                return $fullname;
+            }
+        }
+
+        # Try the URL
+
+        $from_url = $this->openid_to_nickname($display);
+
+        if ($from_url && $this->is_new_nickname($from_url)) {
+            return $from_url;
+        }
+
+        # XXX: others?
+
+        return NULL;
+    }
+
+    function is_new_nickname($str) {
+        if (!Validate::string($str, array('min_length' => 1,
+                                          'max_length' => 64,
+                                          'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
+            return false;
+        }
+    if (!User::allowed_nickname($str)) {
+            return false;
+        }
+        if (User::staticGet('nickname', $str)) {
+            return false;
+        }
+        return true;
+    }
+
+    function openid_to_nickname($openid) {
         if (Auth_Yadis_identifierScheme($openid) == 'XRI') {
-			return $this->xri_to_nickname($openid);
-		} else {
-			return $this->url_to_nickname($openid);
-		}
-	}
+            return $this->xri_to_nickname($openid);
+        } else {
+            return $this->url_to_nickname($openid);
+        }
+    }
 
-	# We try to use an OpenID URL as a legal Laconica user name in this order
-	# 1. Plain hostname, like http://evanp.myopenid.com/
-	# 2. One element in path, like http://profile.typekey.com/EvanProdromou/
-	#    or http://getopenid.com/evanprodromou
+    # We try to use an OpenID URL as a legal Laconica user name in this order
+    # 1. Plain hostname, like http://evanp.myopenid.com/
+    # 2. One element in path, like http://profile.typekey.com/EvanProdromou/
+    #    or http://getopenid.com/evanprodromou
 
     function url_to_nickname($openid) {
-		static $bad = array('query', 'user', 'password', 'port', 'fragment');
-
-	    $parts = parse_url($openid);
-
-		# If any of these parts exist, this won't work
-
-		foreach ($bad as $badpart) {
-			if (array_key_exists($badpart, $parts)) {
-				return NULL;
-			}
-		}
-
-		# We just have host and/or path
-
-		# If it's just a host...
-		if (array_key_exists('host', $parts) &&
-			(!array_key_exists('path', $parts) || strcmp($parts['path'], '/') == 0))
-		{
-			$hostparts = explode('.', $parts['host']);
-
-			# Try to catch common idiom of nickname.service.tld
-
-			if ((count($hostparts) > 2) &&
-				(strlen($hostparts[count($hostparts) - 2]) > 3) && # try to skip .co.uk, .com.au
-				(strcmp($hostparts[0], 'www') != 0))
-			{
-				return $this->nicknamize($hostparts[0]);
-			} else {
-				# Do the whole hostname
-				return $this->nicknamize($parts['host']);
-			}
-		} else {
-			if (array_key_exists('path', $parts)) {
-				# Strip starting, ending slashes
-				$path = preg_replace('@/$@', '', $parts['path']);
-				$path = preg_replace('@^/@', '', $path);
-				if (strpos($path, '/') === false) {
-					return $this->nicknamize($path);
-				}
-			}
-		}
-
-		return NULL;
-	}
-
-	function xri_to_nickname($xri) {
-		$base = $this->xri_base($xri);
-
-		if (!$base) {
-			return NULL;
-		} else {
-			# =evan.prodromou
-			# or @gratis*evan.prodromou
-			$parts = explode('*', substr($base, 1));
-			return $this->nicknamize(array_pop($parts));
-		}
-	}
-
-	function xri_base($xri) {
-		if (substr($xri, 0, 6) == 'xri://') {
-			return substr($xri, 6);
-		} else {
-			return $xri;
-		}
-	}
-
-	# Given a string, try to make it work as a nickname
-
-	function nicknamize($str) {
-		$str = preg_replace('/\W/', '', $str);
-		return strtolower($str);
-	}
+        static $bad = array('query', 'user', 'password', 'port', 'fragment');
+
+        $parts = parse_url($openid);
+
+        # If any of these parts exist, this won't work
+
+        foreach ($bad as $badpart) {
+            if (array_key_exists($badpart, $parts)) {
+                return NULL;
+            }
+        }
+
+        # We just have host and/or path
+
+        # If it's just a host...
+        if (array_key_exists('host', $parts) &&
+            (!array_key_exists('path', $parts) || strcmp($parts['path'], '/') == 0))
+        {
+            $hostparts = explode('.', $parts['host']);
+
+            # Try to catch common idiom of nickname.service.tld
+
+            if ((count($hostparts) > 2) &&
+                (strlen($hostparts[count($hostparts) - 2]) > 3) && # try to skip .co.uk, .com.au
+                (strcmp($hostparts[0], 'www') != 0))
+            {
+                return $this->nicknamize($hostparts[0]);
+            } else {
+                # Do the whole hostname
+                return $this->nicknamize($parts['host']);
+            }
+        } else {
+            if (array_key_exists('path', $parts)) {
+                # Strip starting, ending slashes
+                $path = preg_replace('@/$@', '', $parts['path']);
+                $path = preg_replace('@^/@', '', $path);
+                if (strpos($path, '/') === false) {
+                    return $this->nicknamize($path);
+                }
+            }
+        }
+
+        return NULL;
+    }
+
+    function xri_to_nickname($xri) {
+        $base = $this->xri_base($xri);
+
+        if (!$base) {
+            return NULL;
+        } else {
+            # =evan.prodromou
+            # or @gratis*evan.prodromou
+            $parts = explode('*', substr($base, 1));
+            return $this->nicknamize(array_pop($parts));
+        }
+    }
+
+    function xri_base($xri) {
+        if (substr($xri, 0, 6) == 'xri://') {
+            return substr($xri, 6);
+        } else {
+            return $xri;
+        }
+    }
+
+    # Given a string, try to make it work as a nickname
+
+    function nicknamize($str) {
+        $str = preg_replace('/\W/', '', $str);
+        return strtolower($str);
+    }
 }